ASTROSAT CZTI

Data Quality Report

Orbit 20200812_A09_038T04_9000003802_level2

Creation date: 2021-01-09T07:23:04.022062
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A09_038T04_9000003802cztM0_level2_bc.evt modeM0/AS1A09_038T04_9000003802cztM0_level2_quad_clean.evt
Size (bytes)253,209,600109,437,120
Size241.5 MB 104.4 MB
Events in quadrant A1,140,589735,370
Events in quadrant B1,197,611747,947
Events in quadrant C2,705,721701,542
Events in quadrant D2,215,151717,194

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0119950
B0120690
C0183740
D0150580

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5899991.678251%
B58991031.746059%
C58995819.849127%
D58991362.305476%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 5899 5899 0 0 0.00% 0.00%
B 5899 5899 0 0 0.00% 0.00%
C 5899 5899 20 20 0.34% 0.34%
D 5899 5899 15 15 0.25% 0.25%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 13 254 8892 129.04 295 288 66.7
A 12 194 1827 23.08 295 288 66.7
A 0 226 1811 22.84 295 288 66.7
B 0 230 35225 582.5 298 291 60.0
B 0 219 13186 215.01 298 291 60.0
B 5 172 4805 75.27 298 291 60.0
C 3 233 1608960 23154.92 281 278 69.5
C 0 239 6632 91.45 281 278 69.5
C 4 175 5933 81.39 281 278 69.5
D 1 52 1024738 14586.25 292 283 70.2
D 2 234 26939 379.53 292 283 70.2
D 13 168 21569 303.07 292 283 70.2

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter